A) 0
B) ?1
C) 1
D) \[\infty \]
Correct Answer: C
Solution :
Using L-Hospital's rule, \[\underset{\theta \to \frac{\pi }{2}}{\mathop{\lim }}\,\frac{-1}{-\text{cose}{{\text{c}}^{\text{2}}}\theta }=1\].
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